SPOILER if u haven't beat the game yet
Okay so I feel really stupid, I didn't realize that the play campaign section lets you keep all your characters items/stats but it lets you begin at any quest... Needless to say I finally beat it

Ending kinda disappointed me I thought it was gonna be a badass fight with rais atop the tower but instead it was just button commands :/ ... All in all it was a fun game and I Definetly wanna try to knock out all the challenge posters and do a good amount of side quests, after that I'll try and find the Easter eggs.
I do believe they can make #2 (im pretty positive it will get a sequel) badass... Going up against the GRE an official group/army should be a lot more fun than rais's weak thugs. And my theory is that rais is still alive... I think he fell onto a bag of garbage and will somehow survive.